Nov 10, 2013 #1 B bubbaboy Aquarium Advice Apprentice Joined Oct 2, 2013 Messages 47 I started a planted tank and I'm wondering if 1 T8 Lighting bulb is good for a 20 gallon tank.
Nov 10, 2013 #2 Thumper828 Aquarium Advice FINatic Joined Aug 3, 2013 Messages 623 Location North Carolina I had 1 t8 on my 36 gallon(21 inches deep) I had great results with low light plants.